I greatly enjoyed Jared Diamond’s Guns, Germs, and Steel. In Why Do Some Societies Make Disastrous Decisions? he addresses a question that intrigued his UCLA students:
I was discussing famous collapses such as those of the Anasazi in the U.S. Southwest, Classic Maya civilization in the Yucatan, Easter Island society in the Pacific, Angkor Wat in southeast Asia, Great Zimbabwe in Africa, Fertile Crescent societies, and Harappan Indus Valley societies. These are all societies that we’ve realized, from archaeological discoveries in the last 20 years, hammered away at their own environments and destroyed themselves in part by undermining the environmental resources on which they depended.For example, the Easter Islanders, Polynesian people, settled an island that was originally forested, and whose forests included the world’s largest palm tree. The Easter Islanders gradually chopped down that forest to use the wood for canoes, firewood, transporting statues, raising statues, and carving and also to protect against soil erosion. Eventually they chopped down all the forests to the point where all the tree species were extinct, which meant that they ran out of canoes, they could no longer erect statues, there were no longer trees to protect the topsoil against erosion, and their society collapsed in an epidemic of cannibalism that left 90 percent of the islanders dead. The question that most intrigued my UCLA students was one that hadn’t registered on me: how on Earth could a society make such an obviously disastrous decision as to cut down all the trees on which they depended?
Minus the amusing anecdotes, here’s his breakdown:
First of all, a group may fail to anticipate a problem before the problem actually arrives. Secondly, when the problem arrives, the group may fail to perceive the problem. Then, after they perceive the problem, they may fail even to try to solve the problem. Finally, they may try to solve it but may fail in their attempts to do so.